/*
 * Copyright 2006 Google Inc.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package com.google.gwt.user.client.rpc;

/**
 * For internal use only. Used for server call serialization.
 * @skip
 */
public interface TokenStream {

  void append(String token);

  // Only returns false the first time.
  //
  boolean encodeObjectPrelude(Object o);

  String extract();

  // Finds a previously read object from its backref id.
  //
  Object lookupDecodedObject(String id);

  void prepareToRead(String encodedTokens);

  void prepareToWrite();

  void rememberDecodedObject(Object o);

  String toString();
}
